I always run srp in my pistol loads. Only buy srp, and then there is no way I get spp into my 223 stuff by accident. Have shot thousands of rounds in uspsa with srp. Don’t worry about the spring issues, it should not matter unless you are running super light target springs.
CZ 9mm and Glock 19
1. 115 blue bullet, 3.8 red dot- 125pf. My go to load. Don’t laugh at the red dot, it meters like water through my dillon. 4.1 will get you 130pf (or 1134 fps)
2. 115 Blue bullet-3.7 Vita 320 -117pf
3. 105 Bayou-4.0 Vita 320. 121pf
JP and Lead Star 9mm PCC
105 Bayou. 5.0 Vita 340- 1370 fps or 143pf
115 Blue bullet. 3.5 red dot gives 1211 fps and 139 pf.
I could come down a little off this load, but if I’m running splits in the .16-.18 range, does it really matter?
thoughts- my Dillon hates Vita 320! The powder will slosh a little and get into the rim grooves on the shell plate, and cause a lot of primer seating problems. I know this is supposed to be a premium clean burning powder, but man what a hassle. Red dot flows with no problems!
my CZ HATES the Bayou Bullets, while both of my PCCs will eat them like freaking candy. Go figure. After sorting this out, my future load will be 115 BB and Red Dot. All the guns will run it, I just have to tweak the powder charge a little depending on what I’m loading for. Keep it simple For success! Good luck with your project.